Profit factor : 11.64

Thanks, got my answer

Don't know what's wrong, I've posted detailed statements before. Anyway, here's the rest as a pic (check out the profit factor):

http://i42.tinypic.com/iyfp5u.jpg

this is a common strategy to pull s/l to b/e if in profit, then trailing stop
or pull t/p to b/e if at loss, you just wait long enough to be at a good profit then close it, otherwise trig b/e and exit.

problem is if you meet a big trend and happen to against it you got no chance to trig b/e

you did one average out when 1.6490->1.6442 (-50pips)
which makes position size / acc = 2x16400:500=60:1 and you're in loss, if a big thing come moving the market by 200 pips you're blow up.

you can built a math probability ~ P/L expectation model for this:
create an entry at strong S/R and over-shoot

a. +60% chance, in profit, then pull s/l to b/e, among this 60%:
__++10% chance, in profit >50pip, then pull s/l to trailing stop
__+-50% chance, stop/out at b/e
(some strategy go in between here and t/p half position at +20 pips and use trailing stops for the rest half position)

b. -40% chance, in loss, then pull t/p to b/e, among this 40%:
__-+30% chance, b/e trig within one hour
__--10% chance, in loss for 50~100pips, then add one same position to average out. among this 10%:
_____--+7% chance, exit at b/e for 1st and 2nd order
_____---2.7% chance, add more position to average out, even add fund
_____---------0.3% chance, market move you -200 pips in loss and blow up due to leverage >50

you can see that in the 0.3% chance (2-3 sigma cases) this strategy has no protection of initial capital due to over leverage and not accepting loss
and if you trade 1000 deals you probably will meet such an occasion, and 5-10% of the chance you'll have to average out in order to exit no/loss.